Safety-guard for stamping-presses.



I. M. JONES.

SAFETY GUARD FOR STAMPING PRBSSBS.

APPLICATION FILED NOV. 10, 1911.

Patented Mar. 19, 1912.

JAMES MELVIN JONES, OF HAMILTON, ONTARIO, CANADA.

s erry-ovum For. s'rmrmd-rnsssns.

Specification ofLetters Patent.

Patented Mar. 19, 1912.

Application filed November 10, 1911. Serial No. 659,599.

Toall whom it may concern Be itknown that I, JAMES :rcitizen of theDominion of Canada, residing at 22 King \Villiam street, in the city ofHamilton, in the county of \Ven'tworth, in the Province of Ontario,Dominion of Canada, have invented certain new and useful Improvements inSaftyGuards for Stamping-Presses, of which the following is aspecification. i i This invention relates to safety guards for stampingpresses, and it has more'particular reference to that type of guard suchas is described in the specification :of 'my I former, U. S. Patent-9'Z7953, dated March 6th,, A. D. 1910. I

' Guards of the type specifically referred to are provided with rigidand direct connections between the foot lever and the'guard operatinglever, and between said latter 'lever andjhe latch mechanism wherebyposilive action is insured.

The main object of my present invention is to provide a guard of theclass designated characterized by the fact that the'continuous rigid anddirect eonnectionfrom the foot lever to the latch only exists durin thewithdrawal andreturn of the latch groin its normal position, or for theeffective movement of the'punch or plunger.

A further object of the present improvements is to provide means wherebythe guard must lowered to its preventive POSlilOIkwhen once properlyadjusted-before 'the latch. o rating'mec. anism can be released.

A still further object of the invention isto prov1de means 'whereby theoperators,

fingers or hands are absolutely prevented from being eau ghtjn themachine during themanipulationof the punch or plunger;

or, in other words, the hands or fingers must bemove'd clear of the diesbefore'the upper qne'can descend.

These and other objects are attained by the mechanism illustrated on theIIGQOI'IF panyin drawings and the novel features \vhereo arepartlcularlypointed out by the appended claims.

Iuthe'drawmgs, 'Fi gure1,is a side eleva lion of my improved s afetv gua rdi attachme as ppli b t A i q li j v. a p we 'l sv h' rrelbeesflleshr t i MELVIN J omis,

the side of the press frame by means of set screws orb'olts passedthrough the holes, 2 2. k I

Atthe upper end of the bracket 1, I form a bearing '3, in which issecurely fixed by a setscrew 4, one end of a horizontally dis-' posedspindle'5, which serves as thefulcrum -foithe entire meehanisnn Looselymounted on the aforesaid spindle 5, isfa'bearing" sleeve 6, havingformed-integrally therewith a box shaped part 7,

which serves as a housing for the mainor guardoperatlng lever 8, saidlever belng laterallyhdjusted by means of aset screw 9,

relative to the axis of the spindle 5. In other words by slackening theset screw 9, the lever 8, may moved longitudinally of its axis in'ordrto position the guard accu rately relative to the front face ofthe dies,all of which parts are not shown, as they form no part 'of' thepresentinvention.

5 Forward of the box shaped part 7 and on the lever S, I mount a sleeveor block 10, which is secured in place by a set screw 11. This saidsleeve or block 10, is furnishedat its lower part with an obliquelydisposed lug 12, to which is pivotally united by a fork 13, the upperend of a more or less vertical connecting-rod 14. The lower end of thisrod 14, is coupled to thefoot lever or treadle-not shown-4n a similarmanner to that described in the foregoing referred to patent, and I wishit particularly noted that near the front end and on the lever B, is a"box-shaped bracket 20, furnished at one side with a substantiallyvertical slot 21, in

which is clamped by a set screw 22, adepcndmg arm or bar 23 carrying theguard device proper, which is preferably in'ac cordance with my priorPatent 'No. 1,001,858, dated August 29th, 1911. and need not be herefurther explained or illustrated.

24, is a further box-shaped sleeve or block clamped by a set screw at ornear the opposite, or rear end, of the lever 8. and it is formed at itslower part with an obliquely disposed lug 26, to which is connected astrong tension spring 27, the free end whereof is suitably attached toarea-- venient part of the press frame. The result of this arrangementof parts is that said spring may be accurately tensioned while at thesame time it tends to normally hold the guard and lever 8, in theirelevated position, indicated by the dot-and-dash line a--a, shown onFig. 1,.and it is so dc signed to counterbalance the weight 'of' theconnected parts.

Loosely mounted on the spindle 5', between the bearing 3, and the sleeve6, for example. is a second sleeve 28, having formed at its lower side abox shaped part 29. in which is clamped by a. set screw 30. an auxiliaryor second laterally disposed lever or bar 31. arranged for oscillationup and down in a vertical plane parallel with that traversed by thelever 8, and at a slight distance therefrom;

At or near the rear end of the bar 31. I clamp by a set scrcwflQ, a boxsleeve or block 33. provided with :1 depending lug 34. to which isconnected a tension spring 35. attached at its lower end to the pressframe. the bar 31, l pivotally connect bya pivot pin 36, the forkedlower end 37, of. a compound ronnccting rod 38, fastened at its upperend to the releasing latch of the press, said parts being all inaccordance with my previous patent above first mentioned.

39, is a further box-sleeve clamped on the bar 31. by a set screw40,:1'nd it is so arranged as to be in line beneath the plunger 18, whenthe parts occupy the position shown in the drawings, which is that whenthe guard is lowered and the operator is ready to release the latch andallow the upper die to descend, or perform its effective movement.

It is to be noted that the spring 35, is tensioned to counter-balancethe weight of its connected parts and in consequence the To the extremefront end of.

latch can be kept locked while the guard proper and its operating lever8, may be raised and lowered when desired independent of the regularpress parts every important desideratum when dealing with worknecessitating the hands of the o rator adjacent the work acted upon.thermore it is to be observed that the oscillation of the bar 31, willbe regulated by the movement of the latch, that is to say, if the latchhas a travel of one-half inch the front a similar travel.

In the drawings I have indicated the normal position held by the bar 31,and its p0ssible downward deprcssionby the dot-anddash line b--b.

Tn use and assun'iing the lever 8, is raised or occupying the positionindicated by theline rz-a, the operator will depress the footend of .thelever 31, will be adjusted to have lever thereby pulling on theconnecting-rod 14. and lowering the guard proper in front of the diestill thespririg controlled plunger 18. strikes on the box-sleeve 39,carried by the auxiliary bar 31." At this point and assuming the deviceis'accurately adjusted the 1 guard proper will beinf its absolutepreventiveposition relative to the dies.

slight further pressureon the foot lever will cause a pulle to beexerted on the con nccting rod 38, when the latch will be releasedandthe nress plunger be left free to perform its effective movement. Inother words a rigid and directconne'ction from the foot lever to thelatch is only made possible when the guard proper has been lowered toits said preventive position.

From the foregoing it will be seen that by my present invention T haveefi'ected a very great and important improvement in safety guards of thetype specified while in no way affecting their simplicity ofconstruction.

- Obviously the invention ,may be readily adapted to any tvpe ofstamping press worked or operated bv a foot lever release for the latchmechanism. as every part is made adjustable. and I wish it clearlyunderstood that I do not confine myself to the specific arrangement andcombination of parts illustrated and described. various alterations intheir shape and other arrangemcnts thcreof'being. possible without inany way departing from the spirit and scopeof the invent-ion add it isintended topresent appliguard carrying member, of a manually operablemember, connected to the guard car rying member and a latch releasingmember,

said guard carrying member being independently movable with relation tothe latch releasin member until the guard is moved substantially .toitsprotective position, ad-

the combination with auard carrying ditional movement ofthe e latchreleasmember serving actuate -2. In a -deviceof the character described,ard carrying member. of a latch releasing member, a

manually operable member connected to the guard carrying member, and amember car;

ried by the guard carrying member and adapted to engage thelatchreleasing memher only at the termination of the movement of the guardcarrying member to protective position, to thereby move the latchcarrying member to release the latch.

3. Ina device of the character described, the combination with a pivotedlatch releasing member of a ivoted uard carrying lever located thereaove an; movable independently of the latch releasing lever, and ayieldable contact member carried by the guard carrying lever andarranged to con tact with the latch releasing lever at the .ter-

mination of the downward movement'ofi the guard carrying lever toprotective position to thereby depress the latch releasing lever torelease the latch. a

4. In a device of the character described, the combination with asupporting stud'of a guard carrying lever pivotall mounted thereon, alatch releasing lever li 'ewise pivotally'mounted upon said stud, amanually I operable member engaged with the guard carrying'lever, and aspring plunger carried by the guard carrying lever and adapted tocontact with the latch releasing lever at the termination of thedownward movement of the guard carryin lever to pro- ;ective position,as and for t 1e purposes set orth.

In a device of the character described, the combination with asupporting stud of a spring actuated guard carrying lever pivotallymounted thereon, a latch releasing lever likewise pivotally mounted uponsaid stud, a manually operable member engaged with the guard carryinglever, and a spring plunger carried by the guard carrying lever andadapted to contact with the latch releasinglever at the termination ofthcdownwar-11 ovement of lhe guard carrying lever to pro ertiveposition, as and for the purposce'sej' f orth.

6. In a device of the. character described, the combination with asupporting stud of a spring actuated guard carrying lever pivotally'mounted thereon. a latch releasing lever likewise pivotally mounted uponsaid stud. a manually operable member engaged with the guardcarryingmember, and a' spring plunger carried by the guard carrving lever andadaptedio contact with the latch releasing lever 'at the termination ofthe downward movement of the guard carrye ing lever to protectiveposition, as and for the purposes set forth.

7 In a device of the character described, the combination with asupporting stud of a spring actuated guard carrying lever and a springactuated latch releasing lever pivctally mounted thereon, a latchreleasin lever likewise pivotally mounted upon sait l stud,-a manuallyoperable member engaged with the guard carrying lever, and a springplunger carried by the guard carrying lever and adapted to contact withthe latch releasing lever at the termination of the downward movement oftheguard carrying lever to protective position, as and for the purposesset forth. V

8. In a device of the character described, the combination with apivotally mounted guard carrying lever, of a spring attached tosaidlever for balancing the weight of-the guard and lever,- a latchreleasing lever and spring normally tending-to hold said latch releasinglever in position to prevent :the (latch, 'fro'm" being released,andmeans carried 'bylthefguard carrying lever for depressing Ithe'latchreleasin lever against the tension of said spring at 5'18 termination ofthe movement of the guard carrying lever to-protective position.

9. Ina device of the character described, the combination with apivotally mounted guard carrying lever, of a spring attached to saidlever for balancing the weight of the guard and lever, a latch releasinglever, a

spring normally=tending to hold said latch releasing lever in osition topreventthelatch frombemg neleas ,and'means carriedb theguardcan'lyinglever for depressing the atch releasing ever against thetension of said spring at the-termination of the movementof the guardcarrying lever to protective position, said last named means comprisinga spring pressed phin er carried by. the guard carrying lever anoverlying the latch releasing lever. a

10. In adevice of the character described, the combination with apivotally mounted guard carrying lever, of a spring attached to saidlever for balancing the weight of the guard and lever, a press releasingmember in position to prevent the latch-from being released, and meanscarried by the guard carrying lever for depressing the latch releasinglever against the ,tension of said spring at the termination of themovement of the guard carrying lever to protectiveposition, said lastnamed means comprising a spring pressed plun r carried by the guardcarrying lever an overlying the press releasing member.'

11. In a safety guard attachment of the character set forth, thecombination with a guard carrying member, of a press re- Correction inLetters Patent'No. 1,020,827.

members are pivotally mounted for swinging movement, there being a lostmotion connection between said members.

13. In a safety guard attachment of the character set forth, thecombination with a guard carrying member. of a press releasing memberand a stud upon which both of said members are pivot-ally mounted, saidguard carrying member being capable of -a free and independentpreliminary move-: ment to protective position .with relation to [sun]Signed and sealed this 16th day of July, A. D., 1912.

the press releasing member and engaging and actuating" thepressreleasing member upon continued movement.

, 14. In a safety guard attachmentof the character set forth, thecombination with a guard carrying member of a press releasing member,and a'stud upon which both of said members are pivotally mounted, saidguard carrying member being capable of a .t'reeand independentpreliminary movement'to protective position wlth relation to the pressreleasing member and engaging f and actuating the press-releasing memberupon continued movement, a manually operable member and a rigidconnectlon between the, Inanuallv operable member and the guard carryingmember.

. Slgned at- Hamilton, Ontario, this 6th, day of Noven'iber, 1911.

J AMES MELVIN ONES.

In the presence of ALFRED T. BRATTON, GERTIE NICHOLSON.

It is hereby certified that assessment).1, 20,8 7, granted March 19,1912, upon the application of James Melvin Jones,- of Hamilton, Ontario,Canada, for an improvement in Safety-Guards for,.Stainping Presses, anerror appears in the printed specification requiring correction asfollows: Page 1, lines 15-16, date of patent, for March 6th, A. D; 1910read DecemberfGt/z, A. D., 1910," and that the said Letters Patentshould be read with this correction therein that the same may conform tothe record of the case in the Patent Office.

BILLINGS,

Acting Commissioner of Patents.

Correction in Letters Patent'No. 1,020,827.

members are pivotally mounted for swinging movement, there being a lostmotion connection between said members.

13. In a safety guard attachment of the character set forth, thecombination with a guard carrying member. of a press releasing memberand a stud upon which both of said members are pivot-ally mounted, saidguard carrying member being capable of -a free and independentpreliminary move-: ment to protective position .with relation to [sun]Signed and sealed this 16th day of July, A. D., 1912.

the press releasing member and engaging and actuating" thepressreleasing member upon continued movement.

, 14. In a safety guard attachmentof the character set forth, thecombination with a guard carrying member of a press releasing member,and a'stud upon which both of said members are pivotally mounted, saidguard carrying member being capable of a .t'reeand independentpreliminary movement'to protective position wlth relation to the pressreleasing member and engaging f and actuating the press-releasing memberupon continued movement, a manually operable member and a rigidconnectlon between the, Inanuallv operable member and the guard carryingmember.

. Slgned at- Hamilton, Ontario, this 6th, day of Noven'iber, 1911.

J AMES MELVIN ONES.

In the presence of ALFRED T. BRATTON, GERTIE NICHOLSON.

It is hereby certified that assessment).1, 20,8 7, granted March 19,1912, upon the application of James Melvin Jones,- of Hamilton, Ontario,Canada, for an improvement in Safety-Guards for,.Stainping Presses, anerror appears in the printed specification requiring correction asfollows: Page 1, lines 15-16, date of patent, for March 6th, A. D; 1910read DecemberfGt/z, A. D., 1910," and that the said Letters Patentshould be read with this correction therein that the same may conform tothe record of the case in the Patent Office.

BILLINGS,

Acting Commissioner of Patents.

Correction in Letters Patent No. 1,020,827.

It is hereby certified that in Letters Patent No. 1,020,827, grantedMarch 19, 1912, upon the application of James Melvin Jones, of Hamilton,Ontario, Canada, for an improvement in Safety-Guards forStampingPi-esses, an error appears in the printed specificationrequiring correction as follows: Page 1, lines 1546; date of patent, forMarch 6th, A. D. 1910" read December 661;, A. 0., 1.910; and that theconform to the record of the case in the Patent Oflice.

Signed and sealed this 16th day of July, A. D., 1912.

c. C. BILLINGS,

Acting Commz'ssmer of Patents.

[SEAL.]

